Permutation-padlock



BATENTED FEB. '16,? 1904.

D; P. LLEWELLYN. PERMITTATION PADLOOK. APPLIUATION FILED MAY 23, 1903.

I NO MODEL.

WITNESSES "%"%T@ a Q Affomey UNITE STATES Patented February 16, 1904.

PATENT OFFICE.

'PERMUTATlON-PADLOCK.

SPECIFICATION forming part of Letters Patent No. 752,347, dated February 16, 1904. I i

Application filed May ZS, 1903. fieria-l No. 159.168. (No model.) i I hasp and provided with rotatable circular tum-' blers having locking-notches and a pivotallysupported locking-dog to engage the nose of the hasp; and the object is to improve the art as existing in such locks by providing-a lock wherein allsprings are dispensed with, but still embodying all essential elements whereby the security of the locking means is insured.

I accomplish the purposes of the invention by the constructions and means illustrated in the annexed drawings, to be taken as a part of this specification, and wherein like parts appearing in the several illustrations are designated by like reference-notations.

Referring to the drawings, Figure 1 is a front elevation of the lock, showing the dialplate and knob. Fig. 2 is a front view wherein the front plate is removed and showing the look as open. Fig. 3 is a similar view showing the lock closed, the locking-dog bearing on the perimeter of the tumblers, and the locking-lug engaged in the notch in the nose of the hasp. Fig. 4: is a face View of the primary tumbler, which is carried by the stem of the dial-knob. Fig. 5 is a view of the second tumbler ring or wheel. Fig. 6 is a view of the third tumbler ring or wheel. Fig. 7 if a vertical section through the lock.

The case is made up of a back plate 1, a front plate 2, and rim-plate 3. The parts are united by dovetail lugs formed on the rimplate, engaging in coincident recesses or notches in.the edges of the other plates, and then suitable rivets are projected through the back and the face plates to hold the parts rigidly and firmly together.

The back plate 1 is provided with a pin 4, on which certain of the tumblers are mounted and turn, the pin being cut away on one side to prevent. the separating-washers mounted thereon between the tumblers from turning.

5 designates the hasp, pivotally secured at one end in the case and formed at its free end with a locking-notch 6 to engage a lug on the locking-dog. In the front or face plate is formed a suitable round opening 7, through which the boss on the first or driving-tumbler disk projects and has its bearing.

8 designates thefirst and driving tumbler, formed on its outer face with a circular boss 9, through which is made a central threaded opening 10, in which engages the threaded stem 11 of the finger-piece 12, by which the tumbler 8 is turned. In the rim of the tumbler 8 is cut a notch 13, in which the tail of the locking-dog engages, and in the inner face of this tumbler is secured a pin 141-, which serves as the element for turning the other tumblers, so that their notches are in alinement with the notch 13. Mounted on the boss 9 to turn therewith is the combination-plate 15, having radially directed graduations thereon whichare numbered from zero to 90 and start from a designated central point, as 16, marked on the face of thelockplate. On the pin 4 is pivotally mounted or journaled a rotatable tumbler 17, which consists of a ring-plate provided with an inwardly-extending arm 18, arranged to one side and parallel withthe central radius of the ring and formedon its inner end with a central bearing-ring 19, which has its bearing on the pin 4.- On the pin against the ring 19 is seated a washer 20. In the rim of the tumbler 17 is made a notch 21, having one edge curved, as shown, to provide room or play for the tail of the locking-dog to readily enter and be withdrawn.

22 designates a second rotatable tumbler, consisting of a flat ring having a diametrical arm 23, carrying a central ring-hub 24, the hole of which fits over the pin 4 and rests against the washer 20. A second washer 25 is arranged on the pin 4: and sets down on the ringtumbler 22. A notch 26 is cut in the rim of the tumbler 22- and has one edge curved to permit a limited movement of the tail of the locking-dog. It will be observed that the pin in hub and between the driving-tumbler and the the driving-tumbler 8 engages with the arms of the other tumblers and acts to turn the latter in a manner to bring all the notches into alinement to admit the entrance of the tail of the dog, as indicated in Fig. 2 of the drawings.

27 designates the locking-dog, which is pivotally mounted on a bearing-pin 28, secured in the case. This locking-dog consists of a metal body formed with a curved tailpiece 29, adapted to fall by gravity into the notches when they aline, as seen in Fig. 3 of the drawings, and to ride on the perimetral edges of the tumblers when the elements are in locked position, as seen in Fig. 2 of the drawings. The locking-dog is also formed with a lug 30, which engages in the notch 6 of the hasp, and below the-lug 30 is an extending lip 31, which is engaged by the nose of the hasp to withdraw the tailpiece from tumbler-notches when the locking takes place.

It will be observed that the differences in the disposition and arrangement of the arms of the rotatable tumblers enable the pin in driving or primary tumbler to turn them to I cause of the engagement of the tailpiece of the locking-dog in the notches of the tumblers. The finger-piece can then be slacked up, and the graduated ring can be revolved on its The desired change can bearing on the boss.

then be made from the outside. Suppose the combination is 57-4-14 to open the lock. The dog will throw the last number four numbers back, when the lock is opened. Now the lock being open the finger-piece is slacked and the ring turns to, say, 80, and then the finger-piece is tightened up again. The combination has been changed to 7 7 -24-34 that is, turn to the right to 77, to the left to 24, and again to the right to 34, and the notches have been brought into alinement and the hasp can be withdrawn.

Having described my invention, what I claim, and desire to secure by Letters Patent, 1s

In apermutation-padlock, the casinghaving its parts secured together by means of dovetail lugs, and rivets, a hasp hinged at one end to the casing and between the plates thereof, and anotch formed in its opposite end, a pivotpin 4, rotatable tumblers 17, and 22, having peripheral notches therein, one edge each of which being curved, mounted upon said pin, driving-tumbler. having a peripheral notch similar to tumblers 17 and 22. the circular boss formed upon the outer face of said driving-tumbler, and having a threaded opening engaging the threaded stem of the finger-piece, the graduation-plate 15, mounted on the boss; in combination with the pivotally-mounted locking-dog consisting of the curved tailpiece 29, lug 30, and extending lip 31, all constructed, arranged,and operated as herein described.

In testimony whereof I have signed my name to this specification in the presence of tWo subscribing witnesses.

DAVID F. LLEWELLYN.

Witnesses:

Con. BONNER, WM. E. MERMAID. 

